diff --git a/docs/grammar.txt b/docs/grammar.txt
index 7b29fc626..8e91a7d62 100644
--- a/docs/grammar.txt
+++ b/docs/grammar.txt
@@ -154,8 +154,9 @@ Ufixed = 'ufixed' | ( 'ufixed' [0-9]+ 'x' [0-9]+ )
 
 InlineAssemblyBlock = '{' AssemblyItem* '}'
 
-AssemblyItem = Identifier | FunctionalAssemblyExpression | InlineAssemblyBlock | AssemblyLocalBinding | AssemblyAssignment | AssemblyLabel | NumberLiteral | StringLiteral | HexLiteral
-AssemblyLocalBinding = 'let' Identifier ':=' FunctionalAssemblyExpression
-AssemblyAssignment = ( Identifier ':=' FunctionalAssemblyExpression ) | ( '=:' Identifier )
+AssemblyItem = Identifier | FunctionalAssemblyExpression | InlineAssemblyBlock | AssemblyVariableDeclaration | AssemblyAssignment | AssemblyLabel | NumberLiteral | StringLiteral | HexLiteral
+AssemblyExpression = Identifier | FunctionalAssemblyExpression | NumberLiteral | StringLiteral | HexLiteral
+AssemblyVariableDeclaration = 'let' Identifier ':=' AssemblyExpression
+AssemblyAssignment = ( Identifier ':=' AssemblyExpression ) | ( '=:' Identifier )
 AssemblyLabel = Identifier ':'
 FunctionalAssemblyExpression = Identifier '(' AssemblyItem? ( ',' AssemblyItem )* ')'